Apparatus for recovering soda



(No Model.)

H. BURGESS. APPARATUS FOR RBGOVBRING SODA.

Patented June 3, 1890.

UNITED STATES PATENT Y OFFICE.

HUGH BURGESS, OF ARDMQRE, PENNSYLVANIA.

APPARATUS FOR RECOVERING SODA.

SPECIFICATION forming part of Letters Patent No. 429,417, dated June 3,1890.

Application filed September 23, 1889. Serial No. 324,722. (No model.)

To aZZ whom it may concern:

Be it known that I, HUGH BURGESS, a subject of the Queen of GreatBrit-ain, and a resident of Ardmore, in the county of Montgomery andState of Pennsylvania., have invented a new and useful Improvement inApparatus for Evaporating and Calcining Solutions; and my inventionconsists in certain novel apparatus and combination of apparatus, ofwhich the following is a true and exact description, due reference beinghad to the drawings which accompany and form part of this speciiication,and in which similar letters denote similar parts.

lNIy invention relates to that class of apparatus in which the liquid isevaporated in a rotary evaporator subject to direct action of the heat,and the semi-liquid is then passed from this evaporator into a rotaryincinerator; and it consists, essentially, of interposing a water-backbetween the rotary evaporator and rotary incinerator, so as to avoid thedirect action of a too great heat at the mouth y of the evaporator.

It also consists in the interposition of a lip between the evaporatorand incinerator by which the liquid is carried from the evaporator intothe incinerator. This lip is a waterlip-that is, water is caused to passthrough it, so as to keep its temperature below melting-point.

In the drawings, Figure l is a longitudinal sectional view of myimproved apparatus.

Fig-.2 is a section on line :c w, Fig. l, in direc-l leads from thefire-chamber, so that the products of combustion are provided withafresh supply of heated air to cause a more perfect combustion in theincinerator of the gases from the furnace A and those generated in theincinerator by the combustion of the organic matter in the incineratedmass.

C is a water-jacket, the water passing continuously through the pipe e4and passing out through the pipe e3. This water-jacket forms thesubject-matter of an application already iiled by me, and therefore isnot claimed in this application. The flue B and air-passage c4 both passthrough the water-jacket O. Y

D is a rotary vessel, preferably made cylindrical. This cylinder D maybe constructed of a plate or cast-iron shell lined in the interior withlire-brick, and is rotated by means of a sprocket-chain from the sourceof power operating upon the sprocket-wheel d. This cylinderhas'projecting bands dwhich rest upon the friction rolls or wheels d4.

E is a water-jacket interposed between the cylinder D and the evaporatorF. This water-jacket is supported by means of the rods c, which aresecured at one end to the lugs e on the water-jacket and at the otherend to beams or other suitable support above the cylinders. Thiswater-jacket is so supported that it rests between and in line with thetwo cylinders and has the opening or passage e2 for the products ofcombustion to pass through.

e3 is the inlet-pipe for the water to the water-jacket and e4 theoutlet-pipe for the water-jacket. Water is constantly passed throughthis jacket.

F. is the` water-lip by which connection is made between the cylinders Dand F, the liquid reduced in the evaporator F passing by means of thiswater-lip from the evaporator to the incinerator D. This water-lip maybe supported either as shown in Fig. 2 yor as shown in Fig. 3. In Fig. 2the water-lip is supported by the supports e5, which rest upon the baseupon which the apparatus is support-ed. In Fig. 3 the water-lip E issecured to the water-jacket E by means of bolts or water-connection c5.In the latter case the water-lip is in direct watercommunication withthe jacket E. In Fig. 2, which represents the water-lip not in watercommunication with the jacket E, the water is circulated IOO greaterlength than cylinder D. This cylinder is rotated by a sprocket-chainfrom the source of power operating` upon the sprocket f2, Surroundingsaid cylinder F. This cylinder F has the projecting bands f4, which restupon the friction pulleys or wheels This cylinder maybe constructed inthe manner described for cylinder D. G is a tube leading from the funnelg to said cylinder F.

H is a pipe leading from the liquid-reservoir I to the funnel g.

As shown in the drawings, F is the rot-ary evaporator and D is therotary incinerator.

K is a iiue to ca-rry off the products of combustion to the stack orchimney 7b'. The products of combustionA from the furnace pass throughthe cylinder D, through the opening in the water-jacket, and` into andthrough the cylinder F-and flue K and escape through the stack or flue7c.

The operation is as follows: The lire-brick or furnace A andwater-jacket are brought to the face of the cylinder D and water passedthrough the water-jacket E and water-lip E', and the cylinders D and Fcaused to rotate. The spent or other liquid to be treated is admittedthrough the funnel g and into the cylinder E, and the products ofcombustion passing through this cylinder, as hereinbefore described,cause an evaporation ot the waste from the liquid, increasi ng itsspecific gravity. The rotation of the evaporator F di ifuses the liquidaround the interior surface and brings it into contact with the heatedgases passing through the evaporator. The cylinder F is slightlyinclined, as shown in the drawings, so that the liquid will move slowlythrough it, and it is obvious that the same object can be attained ifthe exterior of the cylinder be in a horizontal line and the interior beslightly flaring. The liquid greatly concentrated by the treatment inthe rotary evaporator passes over the water-lip E into the incineratorD. The water-jacket E, which is interposed between the rotary I) and therotary F, prevents a too great action of the heat at this point, whichis very desirable, as in many cases if this jacket were omitted the heatwould be so great that the brick-work ot' thev evaporator would becometoo highly heated at its edge next to the incinerator. The incinerationof the liquid is completed in the rotary D, and the solid residue isdelivered at the open space below the water-jacket C. The object of theuse of the water-jacket E and the water-lip E interposed between the tworotaries has been fully described hereinbeiore, and its advantages areobvious. The incinerated material passes out from the bottom of theincinerator D at the point L into thc reservoir I, from which it can beremoved for such further use as is desired. The two rotaries are shownin line, but they can be placed at any desired angle with each other,provided that the liquid from the first rotary is delivered into thesecond rotary, and I can use a number of evaporators in connection withacommon incinerator; or I may use several evaporating-cylindersconnecting with each other and with an incinerator.

I do not intend to limit myself to the specie means described forrotating the cylinders. It is preferable, though not essential, that theincinerator and evaporator should be rotated at different speeds, theevaporator being the more rapidly rotated cylinder. It is preferablethat the incinerator should be of greater diameter than the evaporator.lVith some classes of liquids it is essential that the completion oftheoperation should take place farthest from the source of heat, inwhich case the apparatus will be reversed, and the incinerator placedthe farthest from the furnace A, when the evaporator will be thecylinder contiguous t0 said furnace.

My apparatus is especially advantageous for recovering waste alkalinefrom spent liquids produced in making paper-pulp; but it can be usedwith equal advantage for the recovery of any valuable solid matter froma liquid or semi-liquid.

I do not claim in this application the combination of a rot-aryevaporator and a rotary incinerator, said evaporator opening into saidincinerator, whereby the liquid is increased in specific gravity in theevaporator and iiicinerated in the incinerator; nor do I claim in thisapplication the combination of a rotary evaporator and a rotaryincinerator, a combustion-chamber between said evaporator and saidincinerator, both said evaporator and incinerator opening into saidcombus tion-chamber, as these claims form the subject-matter and arespecific claims in a certain application filed by me November l0, 1888,Serial No. 290,452.

Having now fully described my invention, what I claim, and desire toprotect by Letters Patent, is

1. In combination, two or more rotary cylinders, a furnace in front ofthe mouth of one ot said cylinders, and a water-jacket interposedbetween said rotary cylinders.

2. In combination, two or more rotary cylinders opening into each other,a furnace in front of the mouth of one of said cylinders, and awater-jacket interposed between the mouths of said rotary cylinders.

In combination, two or more rotary cylinders, a furnace in front of themouth of one of said cylinders, said cylinders opening into each other,and a water-jacket interposed between the mouths of said cylinders, theproducts of combustion from the furnace passing through said cylindersand water-jacket.

4. In combination, two or more rotary cylinders, aiurnaee in frontof themouth of one of said cylinders, and a water-lip connecting saidcylinders one with the other.

5. In combination, two or more rotary cylinders, a furnace in front ofthe mouth of one of said cylinders, a water-lip connecting said IOO IIO

cylinders one with the other, and a waterjacket interposed between themouths of said cylinders.

6. In combination, two or more rotary cylinders, a furnace in front ofthe mouth of one of said cylinders, water-lips connecting,` saidcylinders one with the other, and water-j ackets interposed between themouths of said cylinders, the water-lips being secured to thewater-jackets respectively.

7. In combination, two or more rotary cy inders, a furnace in front ofthe mouth of one of said cylinders, a water-jacket interposed betweenthe furnace and the mouth of said cylinder, water-lips connecting` saidcylinders one with the other, and water-jackets interposed between themouths of said cylinders.

In testimony of which invention I have hereunto set myhand, atPhiladelphia, Pennsylvania, this 13th day of September, A. D. 1889.

HUGH BURGESS.

l/Vitnesses:

ABNER J. DAvIs, JAMES H. SHIELDS.

